Careers Business Ownership The Prime Interest Rate: How It Affects Your Small Business Loan How do banks establish interest rates? Share PINTEREST Email Print Spaces Images/Blend Images/Getty Images Business Ownership Operations & Success Business Finance Sustainable Businesses Supply Chain Management Operations & Technology Marketing Market Research Business Law & Taxes Business Insurance Accounting Industries Becoming an Owner Table of Contents Expand The U.S. Prime Interest Rate Fixed vs. Variable Interest Rates The LIBOR Benchmark Getting the Best Rate By Rosemary Carlson Rosemary Carlson Rosemary Carlson is a finance instructor, author, and consultant. Along with teaching finance for nearly three decades at schools including the University of Kentucky, Rosemary has served as a financial consultant for companies including Accenture and has developed online course materials in finance for universities and corporations. Learn about our Editorial Process Updated on 04/19/20 When you apply for a small business loan, banks typically use a benchmark to calculate the interest rate they quote on the proposed bank loan. That benchmark is usually the prime interest rate. The prime interest rate is what banks charge their most creditworthy customers, and it is the base rate on corporate loans posted by a majority of the nation's 25 largest banks. In the case of adjustable rate mortgages (ARMs) and other variable rate loans, business owners may be offered a rate based on a similar benchmark, the London Interbank Offered Rate (LIBOR). However, LIBOR will be phased out after 2021. The U.S. Prime Interest Rate The prime interest rate is relevant to small businesses because banks generally use it as the starting point from which to calculate the interest rate to charge on small business loans. The average small business customer can usually count on banks adding a few percentage points to the current prime rate. In a recession, small businesses may have to pay even higher rates. It is almost unheard of for a small business to be offered a loan at the prime interest rate. Most small businesses will be offered an interest rate based on the prime interest rate plus additional percentage points reflecting their own individual risk factors. Most small businesses will be offered an interest rate based on the prime interest rate plus additional percentage points reflecting their own individual risk factors. Fixed vs. Variable Interest Rates on Small Business Loans The prime interest rate has fluctuated significantly over time. In February 1972, for instance, the U.S. prime rate stood at 4.5 percent. It then began a wave-like rise, generally changing either a quarter-point or a half-point monthly. There were periods when it fell back again, but only to a degree. By December 1980, the prime rate stood at an astonishing 21.5%—an all-time high. In comparison, the U.S. prime interest rate was 3.25% in January 2021. This kind of range and the underlying interest rate volatility it represents can be ruinous for small businesses, especially because lenders making shorter-term business loans often deny small businesses a fixed-rate loan, potentially subjecting them to unsustainable interest expenses if the prime rate soars. As a general rule, it is prudent for small business owners to get a fixed rate in a low-interest environment, such as the "quantitative easing" period that followed the 2008-09 Great Recession. While interest rates on fixed-rate loans typically are a point or two higher than a similar loan with a variable rate, accepting the slightly higher fixed rate provides certainty and protects business owners from the kind of rising rates seen in the 1970s. The LIBOR Benchmark LIBOR (London Interbank Offered Rate) is a benchmark used to set interest rates that are based on market conditions. It is used primarily for residential mortgage loans with variable, or adjustable rates. Historically, LIBOR has also been used for home equity lines of credit (HELOC), student loans, credit cards, and automobile loans. Small businesses involved in imports/exports or other international operations may deal with the LIBOR interest rate. This is the overnight interest rate for the London Eurodollar market for loans. It generally moves right along with the prime rate, although historically it has been slightly lower and more volatile than the U.S. prime rate. LIBOR rates will not be published after 2021. The benchmark will be phased out completely on June 30, 2023. The Secured Overnight Financing Rate will replace it. Getting the Best Rate A small business should first apply to the bank with which they do business They're more likely to give a favorable rate to a longtime customer with multiple accounts than to someone they've done little or no business with in the past. Before you apply to the bank, put together a professional presentation concerning why you need the small business loan. Include as many years of financial statements for your business as you have, up to five years. Before you apply to the bank, put together a professional presentation concerning why you need the small business loan. Include as many years of financial statements for your business as you have, up to five years. You should include the balance sheets, income statements, and statements of cash flows. In advance of your presentation to the bank, check with other banks concerning their interest rates on small business loans, along with their other terms. This will give you some negotiating power. Do other banks make loans to businesses similar to yours? Check your credit score and credit report. Fix any errors on your credit report prior to applying for the small business loan. Be prepared to pay several percentage points in interest above either the prime rate or LIBOR.